Solid-state imaging device, method for driving solid-state imaging device, and electronic apparatus

A method for driving a solid-state imaging device, the solid-state imaging device including:

• a pixel part having a plurality of pixels arranged in a matrix pattern, the pixels having a photoelectric converting function;
• and
• a reading part for reading a pixel signal from the pixel part,
• wherein the method comprises steps of:
• acquiring at least one selected from the group consisting of variation information of the pixels and variation information of the reading part;
• and
• generating response data including a unique key in association with the variation information acquired in the acquiring step, the response data generating step including fuzzy extraction performed using a fuzzy extractor, and
• wherein the fuzzy extraction included in the response data generating step includes steps of:
• generating an initial key and helper data, the initial key generating step including a step of generating a true random number using a read-out signal read from a column signal processing part of the reading part, the column signal processing part processing a column output signal input thereto, by a true random number generator arranged to correspond to a column output from the pixel part or a pixel signal read from the pixels by the reading part in a true random number generation mode, the initial key and the helper data being generated based on the true random number generated in the true random number generating step and based on the variation information acquired as a response when the initial key is generated;
• and
• when a key is regenerated, generating a unique key based on the helper data acquired by generating the initial key and based on variation information acquired as a response including an error when the key is regenerated.

An electronic apparatus comprising:

• a solid-state imaging device;
• and
• an optical system for forming a subject image on the solid-state imaging device,
• wherein the solid-state imaging device includes:
• a pixel part having a plurality of pixels arranged in a matrix pattern, the pixels having a photoelectric converting function;
• a reading part for reading a pixel signal from the pixel part;
• and
• a response data generating part including a fuzzy extractor, the response data generating part generating response data including a unique key in association with at least one selected from the group consisting of variation information of the pixels and variation information of the reading part, and
• wherein the fuzzy extractor includes:
• an initial key generating part including a true random number generator arranged to correspond to a column output from the pixel part or a pixel signal read from the pixels by the reading part in a true random number generation mode, the true random number generator generating a true random number using a read-out signal read from a column signal processing part of the reading part, the column signal processing part processing a column output signal input thereto, the initial key generating part generating an initial key and helper data based on the true random number generated by the true random number generator and based on the variation information acquired as a response when the initial key is generated;
• and
• a key regenerating part for generating, when a key is regenerated, a unique key based on the helper data acquired by generating the initial key and based on variation information acquired as a response including an error when the key is regenerated.